Reference Manual
00809-0100-4235, Rev BA
April 2007
2-3
Rosemount 1152
To minimize the possibility of errors, take the following precautions:
•
Make impulse tubing as short as possible.
•
Slope tubing at least one inch per foot up toward the process
connections for liquid and steam.
•
Slope tubing at least one inch per foot down toward the process
connections for gas.
•
Avoid high points in liquid lines and low points in gas lines.
•
Use impulse tubing of sufficient diameter to avoid friction effects.
•
Ensure that all gas is vented from liquid tubing legs.
•
Ensure that the impulse tubing is of adequate strength to be compatible
with anticipated pressure.
For differential transmitters, consider the following:
•
Keep both impulse legs at the same temperature.
•
When sealing fluid is used, fill both piping legs to the same level.
•
When purging is used, make the purge connection close to the process
taps and purge through equal lengths of the same size tubing. Avoid
purging through the transmitter.
Содержание Rosemount 1152 Alphaline
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